\documentclass[12pt, a4paper]{article}
\usepackage{a4wide}
\usepackage[utf8]{inputenc}
\usepackage[spanish]{babel}
\usepackage{color}
\usepackage{url}
\definecolor{lnk}{rgb}{0,0,0.4}
\usepackage[colorlinks = true,linkcolor = lnk,citecolor = black, urlcolor = black]{hyperref}
\usepackage{./otros/caratula}
\usepackage{amssymb}
\usepackage{pdfpages}
\usepackage{a4wide}
\usepackage{makeidx}
\usepackage{moreverb}
\makeindex  

\usepackage{framed}
  
%\newcommand{\tab}{\hspace{2em}}
  
%Para las tablas
% captions
%\usepackage[labelformat = empty]{subcaption}
%\usepackage[small, bf, labelformat = empty]{caption}
\usepackage[labelformat = simple]{subfig}
\usepackage{float}
%\restylefloat{table}

\renewcommand{\thesubfigure}{\relax}